Molding flask



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Patented May 23, 1893.

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(No Model) No. 497,890. Patented May 23, 1893.

UNITED STATES PATENT OFFICE.

JAMES OLIVER, OF SOUTH BEND, INDIANA, ASSIGNOR TO THE SOUTH BEND IRONWORKS, OF SAME PLACE.

MOLDlNG-FLASK.

SPECIFICATION forming part of Letters Patent No. 497,890, dated May 23,1893.

Application filed November 28, 1890. Serial No. 372,912. (No model.)

T0 on whom it may concern.-

Be it known that I, JAMES OLIVER, of South Bend, in the county of St.Joseph and State of Indiana, have invented certain new and usefulImprovements in Molding-Flasks; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to an improvement in molding flasks.

Hitherto in chilling plow irons and especially the points of plows amovable chill has been employed for the purpose and consequently it hasbeen necessary to make the molding flask larger than would otherwise benecessary in order to receive and retain the chill during the process ofmolding. Also in former constructions of flasks considerably more thanthe necessary amount of sand has been required, and the size of theflask has been necessarily increased, thus adding to the weight, amountof molding sand required and to the general expense attending themanufacture of the flasks andthe articles molded in them. In addition tothe fact that heretofore the flask was unnecessarily large in order toreceive the pattern, chill and article cast, in the use of a movablechill, there was always more or less liability of the chill springingwhen the molten metal struck it which resulted in making the edge of thepoint or other article thicker at each end than in the center.

The object of this invention is to diminish the time, labor and expenseof production and produce better results in chilling by preventing thechill from moving or warping thereby evenly distributing the metal andforming an article of uniform thickness.

With this object in view my invention consists in a flask having a chillwith a braced or ribbed back and in certain other features ofconstruction and combinations of parts as will be hereinafter describedand pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view of my improvedflask. Fig. 2 is a side elevation, and Fig. 3 is a view in perspectivewith the cope section partly raised.

A represents the drag section of the flask ably hinged together forconvenience in manipulating the flask before and after the process ofmolding. Of course this general shape could be greatly varied but Iprefer the shape shown and described because it reduces the sandnecessary about two-thirds and hence diminishes the weight and theexpense'of molding. The outer edges of the flask may be parallel but theinner edges are necessarily more or less irregular but are made tocorrespond with and fit each other in the usual way.

The body of one section of the flask, preferably the drag is larger thanthe other, and the other section, the cope in this instance, is providedwith a flange 1 which extends from the edge of the cope to the edge ofthe drag forming a chill against which the cutting edge of the point isformed. This chill may be a separate part and be fastened by bolts,screws or rivets if desired. Thus the chill is a part of one of thesections, either an integral part of it or rigidly secured thereto andby extending laterally at an angle from one edge of the section, thischill is braced from end to end, thus preventing its warping or bendingwhen the molten metal strikes it as heretofore which resulted in makinga casting thicker at certain parts than at others.

By this invention the edge of the flask section by being at an angle tothe chill removes any possibility of the latter from bending and thearticles chilled are straight and of uniform thickness throughout as aresult of this provision. The chill is thus outside of the body of thecope so that the size of the portion which contains the sand isconsiderably lessened. The hinges 2, 2, are conveniently formed on theouter edge of the chill.

It is evident that slight changes might be made in the form andarrangement of the several parts described without departing from thespirit and scope of my invention and hence I do not wish to limit myselfto the exact construction set forth, but

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. A flask for molding plow points comprising cope and drag sectionsmade to substantially conform to the shape of the article to be molded,one of the sections having a chill formed therein, the inner edge of thechill being integral with and at an angle to one side of the section,and the remaining two sides of the section joining the chill side atacute angles whereby the frame of the section braces the chill at thetwo ends and at the back to the end that the chill is braced, made rigidand prevented from warping so that the edge of the article chilled ismade uniform throughout its length, substantially as set forth.

2. Amolding flask comprisingcope and drag sections made to conform toeach other and having a general triangular shape, one section having achill integral with one side thereof, said chill extending at an angleto the side of the frame whereby the side forms a longitudinal rib andthe other two sides of the section extend from the ends of the chill andchill side of the frame at an acute angle to the end that the chill isbraced from the back and ends and prevented from Warping, substantiallyas set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

JAMES OLIVER. v

Witnesses:

F. O. NIPPOLD, M. M. MATTHEWS.

